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Introduction to Java 1 What is a Computer? 2 What is computer language? 3 Why Computer Language is required? 4 JDK Development Kit 21.0.1 download and install 5 IDE (Integrated Development Environment) 6 Introduction to BlueJ 7 Hello World in Java 8 Difference between println and print 9 How to Run Java Program using CMD 10 What is source code? 11 What is Byte code?

Elementary Concepts of Programming 1 Identifiers in Programming Language 2 Keywords in Programming Language 3 Java A Strongly Typed Language 4 What is algorithm?

DataTypes in java 1 Introduction to Data type Java 2 Data Type Conversion or Casting in Java 3 Type Casting with Objects in Java

Variables in java 1 What is variable in programming?

Common Errors in Program 1 Common Errors in Program 2 Syntax Error in Java Programming language 3 Runtime error in Java Programming language 4 Logic Error in Java Programming language

Basic Assignments in Java 1 Assignment: Calculate Sum and Average of Three Numbers

Decision Making in java 1 Control flow in programming 2 Decision Making in Java Introduction 3 if else statement Control Flow in Programming Language 4 Assignment: Determine if a Number is Even or Odd

Looping in java 1 Loop Introduction in Java Language 2 Why Do We Need Iterative Constructs in Programming? 3 Types of loops in Java 4 While Loop in Java Language 5 While loop example in Java 6 Infinite while loop in Java 7 Enhanced For Loop (For-Each Loop) in Java 8 Java Loop MCQ Question 9 Empty Loop in Java

String in java 1 Question 6 - Java MCQ 2 Question 7 - Java MCQ 3 Question 1 - Java MCQ 4 Question 2 - Java MCQ 5 Question 3 - Java MCQ 6 Question 4 - Java MCQ 7 Question 5 - Java MCQ

Array in java 1 Array in java 2 Array Introduction in Data Structure 3 Need for Array 4 Types of Array 5 Array Declaration with Initialization Using Values - Java 6 Read all elements of an array using Index 7 Java Array fixed-size sequence/ same type 8 Find the size of an array 9 Read all elements of an array using Loops 10 Enhanced For Loop (For-Each Loop) in Java 11 Java Array Error 12 Finding the sum of all array elements 13 Array with Function

Searching in Arrays (Java) 1 Introduction to Searching in Java 2 Linear Search Searching in Arrays (Java) 3 Binary Search in Arrays (Java) 4 Built-in Searching Methods in Java

Functions / Methods 1 Functions / Methods in Programming Languages 2 What is one advantage of using a method? 3 Java Function Prototypes: The Great Confusion Cleared 4 Method/function Parameters vs Arguments 5 Return type of method/function 6 Call by Value vs Call by Reference in Java

Object-Oriented Programming (OOP) Java 1 Student Management System (Basic Version) 2 Java Program to Implement a 2D Point Class with Printing and Equality Check 3 Java Program to Implement a Circle Class 4 Java Program to Implement a Student Class 5 Encapsulation

Inheritance in java 1 Inheritance in Java (IS-A)

Interface in java 1 Introduction to Interface

Managing Errors and Exception 1 Introduction to Exception Handling - Java

Java Library Classes and Packages 1 Java Library Classes and Packages

File Operations Java 1 File Operations Java 2 Types of Streams in Java 3 Writing Data to Text Files in Java 4 Reading Data from Text Files 5 Writing to Binary Files 6 Reading from Binary Files

Common mistakes in programming , along with solutions: 1 Accessing Non-Static Members from Static Methods 2 Missing Closing Curly Braces 3 Missing break in Switch Case Constructs 4 Confusing Assignment with Comparison (= and ==) 5 Using Less Restrictive Access Modifiers 6 Forgetting to Free Up Resources 7 Off-by-One Errors 8 Hardcoding Values 9 Ignoring Error Handling 10 Copy-Pasting Code Without Understanding 11 Infinite Loops mistakes 12 Ignoring Warnings and Code Style Guides 13 Overusing Global Variables 14 Using Magic Numbers 15 Not Commenting Code or Over-Commenting 16 Incorrect Use of Data Structures 17 Neglecting Unit Tests 18 Poor Variable Naming 19 Inconsistent Code Formatting 20 Not Using Version Control 21 Forgetting to Initialize Variables 22 Incorrectly Managing Thread Synchronization 23 Ignoring Security Best Practices 24 Relying on Floating Point Arithmetic for Precise Calculations 25 Improper Use of Libraries or APIs 26 Overusing Recursive Functions 27 Not Refactoring

Project 1: Question and Solution 1 Project Question: Electricity Bill Calculator

Project 2: Question and Solution 1 Project Question: Hotel Booking System

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Java Program to Implement a 2D Point Class with Printing and Equality Check

Rumman Ansari September 27, 2025 249 views

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